Singapore has done an awful lot in that regard as well. All the trains, stations, escalators and stairs for the underground system (called MRT) is spot less. And I mean absolutely spot less. I had to actually teach myself to look at the seat before sitting in some other metropolitan cities as the trains in Singapore are always very clean. Surely there are drunken people on the train but I guess the SGD 5000 fine goes someway in stopping littering.

The newer trains in Singapore are driverless. May be the authorities should look in that direction.

Since nobody seems to notice, just wanted to mention that Lahore is in Pakistan. The two brothers allegedly did it to protect their program from being pirated. Whats noteworthy is that they even left their names and contact address, so the victim can contact them to clean up if he/she wants. The message that would appear said: "Welcome to the Dungeon © 1986 Basit * Amjad (pvt) Ltd. BRAIN COMPUTER SERVICES 730 NIZAM BLOCK ALLAMA IQBAL TOWN LAHORE-PAKISTAN PHONE: 430791,443248,280530. Beware of this VIRUS.... Contact us for vaccination..." The two brothers, are still running their own business "Brain Telecommunication Limited" in Pakistan.